JP2017096491A - Solenoid valve having an armature with a movable step - Google Patents

Abstract

The present invention relates to mitigating the impact force of an armature on a pole core by energization in a solenoid valve in which the pole core is fixedly arranged and the armature is arranged so as to be displaceable in the axial direction. An electromagnetic valve 1 is provided with valve sleeves 5 and 6 in which a pole iron core 2 is arranged and an armature 3 is arranged so as to be displaceable in an axial direction, and the electromagnetic valve is opened and / or closed. For this purpose, an electromagnetic valve in which the armature is moved toward the pole core against the force of the spring by the magnetic force induced by the magnet assembly is provided with an armature sleeve 12 that at least partially surrounds the armature. The sleeve is adapted to be axially displaceable relative to the armature and relative to the valve sleeve. [Selection] Figure 2

Description

  The present invention provides an electromagnetic valve having a valve sleeve in which a pole iron core is fixedly arranged and an armature is arranged so as to be axially displaceable, and the electromagnetic valve is opened and / or closed in order to open the valve. The present invention relates to the solenoid valve in which the armature is moved toward the pole iron core against the force of the spring by the magnetic force induced by the magnet assembly.

  Solenoid valves of the kind mentioned at the beginning are known from the state of the art. A conventional solenoid valve, particularly a solenoid valve for a hydraulic device used in, for example, an anti-lock brake system (ABS) or anti-slip regulator system (ASR system) or an electronic stability program (ESP system) is illustrated in FIG. The solenoid valve 1 has actuator technology, which includes a magnet assembly 11 (magnetic coil that can be energized) and a pole iron core 2 and acts on an armature 3 that is axially displaceable within the valve sleeves 5 and 6. . The valve sleeves 5, 6 may be configured as a two-part valve sleeve comprising an upper valve sleeve 5 and a lower valve sleeve 6. The valve cartridge of the solenoid valve 1 is positioned in the withdrawal portion of the fluid assembly block 7. The solenoid valve 1 is caulked with a fluid assembly block 7 using a caulking flange 8 via a valve sleeve 5. The armature 3 further has a closing element 9, which is pressed against the valve seat 10 in the non-current state of the magnet actuator. For this reason, the armature 3 is biased in advance and is held in the valve sleeves 5 and 6. Usually, in order to provide this pre-biasing force, a compression spring 4, in particular a coil spring, is provided which acts between the polar core 2 and the armature 3 or is held in a pre-biased state. One end of the compression spring 4 is supported by the pole iron core 2 that is fixedly arranged, and the other end is supported by the armature 3 that can be displaced. For this reason, the armature 3 has a drawing-out portion, and the coil spring is substantially included and guided in the drawing-out portion. In an alternative embodiment, the pole core 2 can also have a withdrawal portion, in which the coil spring is substantially contained and guided (but this embodiment is not shown in FIG. 1). Not shown). The portion of the compression spring 4 that protrudes from the drawing-out portion is supported by the pole iron core 2 and extends from the end face of the armature 3 on the pole core 2 side to the end face of the pole core 2 on the armature 3 side. A so-called working air gap is formed in a non-current state. This working air gap determines the maximum possible displacement distance of the armature 3 and thus determines the valve travel of the solenoid valve 1. When the solenoid valve 1 is energized, the armature 3 moves upward and is locked by the pole iron core 2, whereby the air gap between the pole iron core 2 and the armature 3 is closed. When de-energized, the armature is moved downward by the compression spring 4 toward the valve sleeves 5 and 6 so that the closing element 9 abuts against the valve seat 10 and thus the valve is closed. Normally, when energized, the magnetic force increases as the working air gap decreases. This increase in magnetic force makes it difficult to continuously adjust the solenoid valve 1. It is known to provide a compression spring 4 with a gradual spring characteristic curve or to provide an additional spring (not shown) with a gradual spring characteristic curve to improve adjustment. .

  From the technical level, for example, Patent Document 1 is known. This document relates to a solenoid valve equipped with a magnet assembly. The magnet assembly opens and / or closes the solenoid valve with a magnet armature that is movable in the longitudinal direction inside the guide sleeve. Move to the extreme iron core against the force. According to the present invention, the longitudinally movable magnet armature and the pole iron core each have at least one step portion, and these step portions are engaged with each other to form a pushing step portion. In this case, the magnet armature step and / or the pole core step is geometrically configured as follows: an edge pair in which the magnet armature step and the pole core step complement each other during operation. Are always congruent to each other, and are configured to guide the movable magnet armature when the pushing step portion is engaged.

  Furthermore, Patent Document 2 is known from the technical level. This document relates to an electromagnetic valve including a magnet assembly and a valve cartridge. In this case, the transition of the magnetic force, the spring force and the fluid force is combined through the travel transition of the armature and the closing element as follows: between the closed position and the open position of the armature and the closing element. Are combined so that at least one other stable working point representing a force balanced center of gravity with a negative overall force gradient can be adjusted.

  The pushing step basically offers the possibility of controlling the magnetic force via the valve stroke. However, this places high demands on manufacturing accuracy and manufacturing processes. This creates a relatively high cost, so this type of valve is not suitable for any application case.

  Furthermore, active control, i.e. changing the energization via the valve stroke, is only possible using additional sensors that detect the movement of the valve. This adds complexity and costs.

German Patent Application No. 102006047923A1 German Patent Application Publication No. 102007031981A1

  On the other hand, the solenoid valve according to the invention is advantageous because it allows the magnetic force acting on the components of the solenoid valve to be controlled by simple construction means. This approach is made possible by structural replacement with simple additional components without the need for extreme manufacturing accuracy or additional sensor devices.

  According to the invention, this is made possible by the configuration described in claim 1. Further configurations of the invention are subject of the dependent claims.

  An electromagnetic valve having a valve sleeve in which a pole iron core is fixedly arranged and an armature is arranged so as to be axially displaceable, in order to open and / or close the solenoid valve, the armature is magnetized The solenoid valve according to the present invention is adapted to move toward the pole iron core against a spring force by a magnetic force induced by an assembly, and is provided with an armature sleeve that at least partially surrounds the armature. It is implemented so that it can be displaced in the axial direction relative to the armature and relative to the valve sleeve.

  The conventional solenoid valve has already been described in the background art section. According to the invention, an additional armature sleeve is provided. That is, a valve sleeve and an armature sleeve are provided. The armature sleeve is implemented from a ferromagnetic material and can be controlled by a magnetic field, or it can perform such control itself. The armature sleeve is implemented, for example, as a cylindrical object that extends around the armature. Of course, other shapes are possible (e.g. open winding sleeves) and discontinuous sides are possible. The armature sleeve at least partially surrounds the armature. The inner diameter of the armature sleeve and the outer diameter of the armature are aligned with each other in the following manner, i.e. so that relative independent movement between these two elements is possible in the axial direction. This means that both the armature and the armature sleeve are movable within the valve sleeve. Independent vertical movement of both components within the valve sleeve is also at least limitedly possible. The axial displacement capability of both components can of course be limited to some extent by the structural formation of these or other components and the constraints resulting therefrom. Advantageously, the additional component armature sleeve and the possible axial displacement of the armature sleeve also allows independent movement of the armature sleeve relative to the armature or relative to the valve sleeve. Thereby, control of the magnetic force which generate | occur | produces and acts on a component can be obtained.

  In a further preferred configuration, the solenoid valve is characterized in that the armature sleeve is displaceable by the generated magnetic force.

  As already mentioned, the armature sleeve is advantageously implemented from a ferromagnetic material and can therefore be responded with a generated magnetic field. By energizing the magnet assembly of the valve, that is, energizing the magnet coil, a magnetic circuit is generated in the valve. This magnetic circuit generates a magnetic force in the ferromagnetic element. Thereby, for example, the armature can be brought from the valve closing position to the valve opening position against the acting spring force and fluid force. That is, it can be moved from the valve seat toward the pole core. Advantageously, the magnetic force also acts on the armature sleeve. When the magnet assembly is energized as specified, the armature sleeve is activated by the generated magnetic field and moves in the direction of the pole core. At that time, the armature sleeve is not directly affected by the spring force. In addition, independent axial movement is possible between the armature sleeve and the armature, at least in a limited way. Therefore, in the starting position, the spring force acting on the armature does not act on the armature sleeve. Therefore, the movement of the armature sleeve is performed with a smaller current strength than the armature that is biased by the spring force. That is, the movement of the armature sleeve is already performed earlier than the movement of the armature. When the armature movement starts, the armature sleeve is already completely displaced. The description of the induced magnetic force is synonymous with the description of the generated magnetic force.

  In a further preferred configuration, the solenoid valve is capable of forming a contact between the pole core and the armature sleeve, and is characterized by reducing the acting magnetic force by the magnetic short circuit generated in this way. Yes.

  This is understood that these components are formed so as to allow the armature sleeve to be locked in the pole iron core and are aligned with each other. Component formation or shaping and component alignment can be understood as, for example, geometric setting and dimensioning and component dimensions. A portion of the magnetic circuit is short-circuited when the ferromagnetic armature sleeve comes into contact with the pole iron core. As a result of this type of short circuit in the magnetic circuit, the acting magnetic force is reduced. Thereby, further acceleration of the moving part can be reduced or avoided. It is also possible to reduce the final speed of the moving part (compared to the action under normal magnetic force without magnetic short circuit). This is advantageous because it reduces the impact when the motion component is locked with the pole core. This reduces noise emissions and improves noise characteristics. The component definitions and their interrelationships are advantageously at the time of a magnetic short (eg related to the height of the valve stroke at which the short occurs) and the magnitude of the reduction in the acting magnetic force is also arranged. can do. The description of the induced magnetic force is synonymous with the description of the acting magnetic force.

  In one possible configuration, the solenoid valve is characterized in that when the armature approaches the pole core, a magnetic short is formed by contact between the armature sleeve and the pole core before the armature is locked by the pole core. .

  This is understood that the locking of the armature sleeve in the pole core (and the partial magnetic circuit formed thereby) occurs when the armature is already displaced. The magnetic force on the armature increases as the distance between the armature and the polar core decreases. Due to the short circuit, the acting magnetic force is reduced. Therefore, a short circuit is not yet formed in the closed position of the solenoid valve, i.e. not yet formed when the armature shuts off the valve seat with a plunger or seal bolt. Thereby, the initially small magnetic force can be further weakened. However, in order to positively control the impact of armature locking in the pole core due to magnetic shorting (and the resulting reduction in magnetic force), the short circuit is formed before the armature is locked in the pole core. In this case, the armature is at a position between the valve closing position and the valve opening position of the solenoid valve.

  In a preferred embodiment, the solenoid valve is characterized in that a magnetic short circuit is formed by contact between the armature sleeve and the pole iron core at a predetermined interval between the armature and the pole iron core.

  This is understood to be that these components are shaped and aligned with each other as follows: the initial contact between the armature sleeve and the pole core (and thus the magnetic short) is the predetermined of the armature and pole core. And are aligned with each other. This is advantageous because the magnetic force can be matched to the specific requirements present and optimized noise characteristics can be obtained. Particularly advantageously, the short circuit is formed when the acting magnetic force is increased by the armature already approaching the pole core and the spacing is reduced. As a result, the initial small magnetic force when the distance between the armature and the iron core is large is optimally used, but when the distance between the armature and the iron core decreases and the magnetic force increases, the magnetic force is optimally weakened. Is advantageous because it can be achieved.

In one possible configuration, the solenoid valve is
In the first position of the solenoid valve, where the armature closing element closes the valve seat;
A magnetic short circuit can be formed at the second position of the solenoid valve where the valve seat is fully open and the armature is in contact with the pole core;
A magnetic short circuit can be formed at an intermediate position of the solenoid valve where the valve seat is at least partially open and the armature is not in contact with the pole iron core.
It is characterized by that.

  As a plurality of positions of the solenoid valve, a plurality of states of the solenoid valve (for example, completely opened and closed) can be considered. These states are defined in particular by the precise positioning of the components of the solenoid valve that exist at each point in time. The above-mentioned contact particularly relates to the contact between the radially extending regions of the two components in the axial direction. The intermediate position indicates that the armature does not contact the pole iron core. This is understood, in particular, that there is still a gap as both components approach.

  In a preferred embodiment, the solenoid valve is characterized in that the armature sleeve is positioned between the armature and the valve sleeve.

  This is understood that the armature sleeve is advantageously at least partly surrounding the armature from the outside, in particular completely positioned inside the valve sleeve. The outer diameter of the armature sleeve and the inner diameter of the valve sleeve are aligned with each other to allow relative independent movement.

  In a further preferred configuration, the solenoid valve is characterized in that the armature has an upper shoulder and the armature sleeve has a step to allow locking at the upper shoulder.

  This is understood to form an upper stopper that limits independent axial movement of the armature sleeve relative to the armature. For this reason, a step is formed in the armature sleeve. The step portion is, for example, on the end face of the armature sleeve, and this end face is the end face on the pole core side and on the side opposite to the valve chamber. The armature sleeve step may advantageously be formed on the inner surface of the armature sleeve. That is, the step portion of the armature sleeve may be formed inward. At that time, the inner diameter of the armature sleeve at the position of the armature sleeve step portion is larger than the normal inner diameter of the armature sleeve. The armature further has an upper shoulder portion, and this upper shoulder portion is also formed on the end surface on the pole core side of the armature. The shoulder extends radially outward and has a larger outer diameter than the regular armature body. The armature upper shoulder and the armature sleeve step of the armature sleeve are formed such that they form complementary elements and are aligned with each other. Therefore, the shoulder and the step correspond to each other depending on the structure.

  In one preferred configuration, the solenoid valve has a gap between the upper shoulder of the armature and the step of the armature sleeve in a non-energized stationary state that determines the displacement gap, and when energized, the armature sleeve is first The displacement gap is displaced until the stepped portion of the sleeve contacts the upper shoulder of the armature.

  This is understood that the displacement gap is determined via the structural dimension of the free movement space between the components of the solenoid valve. The displacement gap may be maximized when the armature sleeve is in a rest position when the armature is pressed into the valve seat by a spring with the solenoid valve de-energized. The size of the displacement gap is such that the armature sleeve can be displaced when energized before the armature sleeve is prevented from further displacement by the locking of the armature sleeve step at the upper shoulder of the armature. Determine possible relative displacement distance.

  In one possible embodiment, the solenoid valve is provided with a retaining ring between the armature and the valve sleeve, the retaining ring being configured to prevent passage of the armature sleeve into the valve chamber. It is a feature.

  This is understood to be provided with a retaining ring. For example, the retaining ring may be positioned on the valve chamber side of the armature. In this case, the retaining ring forms a restriction for the displacement of the armature sleeve in the direction of the fluid chamber. For example, the retaining ring may completely surround the armature. In a preferred embodiment, the retaining ring is pressed against the armature. Advantageously, the retaining ring guides the magnetic flux radially outward and also towards the magnet assembly. In an alternative embodiment, the retaining ring can also be coupled with the valve sleeve. In this embodiment, the retaining ring is advantageously configured as a clamping sleeve structure. By using the retaining ring, the displacement gap is notably reduced through the structure, dimensions of the components such as the armature (especially the upper shoulder of the armature), the armature sleeve (especially the armature sleeve step) and the retaining ring, Determined through mutual positioning.

  In one possible configuration, the solenoid valve is characterized in that the armature sleeve is indirectly coupled to the spring via the armature.

  This is understood that the armature sleeve can initially move independently of the armature. Only after the displacement gap is overcome or after the magnitude of the displacement distance has changed, the armature sleeve is joined to the armature by material contact between the armature sleeve step and the upper shoulder. The armature is biased by a spring by a spring, and is thereby held in the closed position of the solenoid valve in a non-energized state. After overcoming the displacement gap, the spring force acts on the armature sleeve (via the armature). Advantageously, there is no operative connection between the spring and the armature sleeve during movement of the armature sleeve within the displacement gap.

  In one further preferred embodiment, the solenoid valve is characterized in that a fluid compensation groove is provided between the armature sleeve and the armature.

  During relative movement between the armature sleeve and the armature, for example, drains fluid from the space between the armature step and the upper shoulder of the armature or from the space between the lower end face of the armature sleeve and the retaining ring There are things that need to be done. For this reason, for example, one or more fluid compensation grooves may be formed between the armature and the armature sleeve. This is advantageous because it allows a reduction in flow resistance and an optimal flow of the fluid. By intentionally adjusting the flow resistance, it is possible to adjust the ease of movement of the component and the improvement of the buffering of the movement of the component.

In one preferred configuration, the solenoid valve is configured such that the components are configured as follows and are aligned with one another:
At position A of the solenoid valve, the armature closing element closes the valve seat so that the armature sleeve rests on the retaining ring and there is no contact between the armature upper shoulder and the armature sleeve step. And / or
At position B of the solenoid valve, the armature closing element closes the valve seat and there is an abutment between the upper shoulder of the armature and the step of the armature sleeve, and / or
At position C of the solenoid valve, the armature closing element at least partially releases the valve seat, the armature sleeve abuts against the pole iron, and the armature does not abut against the pole iron, and / or
At position D of the solenoid valve, the armature closing element fully releases the valve seat, the armature sleeve abuts the pole iron, and the armature also abuts the pole core.
The components are configured and are aligned with each other.

  This is understood to be the embodiment described below in FIG. This is advantageous because a force transition of the magnetic force matched to the application example can be obtained through the armature valve stroke. In this case, the positions A to D are sequentially occupied by the solenoid valve in a time series in one stroke. Abutting is understood to mean in particular that the radial regions of the two components abut in the axial direction. The position C represents that the armature does not contact the pole iron core. This is understood in particular to be still spaced as the two components approach.

  Note that the structural requirements individually described in the present specification can be combined with each other in any technically significant manner to clearly show other configurations of the present invention.

  Other configurations and purposeful functionality of the present invention will be apparent from the description of embodiments with the accompanying drawings.

It is sectional drawing of the conventional non-current valve-closing solenoid valve. It is sectional drawing of 1st Embodiment of the solenoid valve by this invention. It is a figure which shows the motion series of the component of 1st Embodiment of the solenoid valve by this invention. It is a figure which shows the motion series of the component of 1st Embodiment of the solenoid valve by this invention. It is a figure which shows the motion series of the component of 1st Embodiment of the solenoid valve by this invention. It is a figure which shows the motion series of the component of 1st Embodiment of the solenoid valve by this invention. It is a figure which shows the force and distance transition of the magnetic force which acts on an armature.

  FIG. 1 is a sectional view of an electromagnetic valve known from the state of the art for a hydraulic assembly for vehicles. A description of this solenoid valve can be found in the description in the background art section.

  FIG. 2 shows a portion of a cross-sectional view of one embodiment of a solenoid valve 1 according to the present invention. The solenoid valve 1 is shown in a non-energized closed position. The spring 4 holds the electromagnetic valve 1 in a closed state. FIG. 2 further shows an armature sleeve 12 according to the present invention. The armature sleeve 12 surrounds the armature 3. The inner diameter of the armature sleeve 12 is aligned with the outer diameter of the armature 3 as follows, i.e., aligned to allow relative movement between the components 12 and 3 in the axial direction. In this case, the armature sleeve 12 is implemented as a cylindrical object that extends around the armature. The armature sleeve 12 is implemented from a ferromagnetic material and can therefore be responded using the generated magnetic field. Further, at least the polar core 2, the armature 3, and the retaining ring 15 that are constituent elements are similarly ferromagnetically implemented. On the other hand, the spring 4 and the valve seat 10 which are components are not implemented ferromagnetically.

  Furthermore, it can be seen that the armature sleeve 12 has an armature sleeve step 13. The armature sleeve step is on the end face of the armature sleeve 12. This end face is an end face on the pole core 2 side and on the side opposite to the valve chamber 19. The armature sleeve step 13 is formed on the inner surface of the armature sleeve 12. The armature 3 further has an upper shoulder 14 which is also formed on the end face of the armature 3 on the pole core 2 side. The upper shoulder 14 of the armature 3 and the armature sleeve step 13 of the armature sleeve 12 are aligned with each other as follows, i.e. they are complementary to limit the relative displacement in one direction between the armature sleeve 12 and the armature 3. Align to form sex elements. The retaining ring 15 forms a restriction for the displacement of the armature sleeve 12 in the other direction. The retaining ring 15 is positioned on the valve chamber 19 side of the armature 3. In this case, the retaining ring 15 completely surrounds the armature 3 and is crimped thereto. Accordingly, the retaining ring 15 prevents the armature sleeve 12 from falling downward (in a non-energized state). Furthermore, the retaining ring 15 guides the magnetic flux to the magnet assembly 11 on the radially outer side.

  As already mentioned in the background section, the working air gap 17 determines the maximum possible displacement distance of the armature 3 and thus determines the valve travel of the solenoid valve 1. The relative displaceable distance between the armature sleeve 12 and the armature is determined by the displacement gap 16. The displacement gap is maximum when the armature sleeve 12 contacts the retaining ring 15. Furthermore, in this embodiment, the fluid compensation groove 18 is used. Such a fluid compensation groove 18 is illustrated between the armature 3 and the armature sleeve 12.

  FIG. 2 shows the individual components of one embodiment of a solenoid valve 1 according to the invention, but the solenoid valve 1 is in a non-energized closed state. In order to explain the action of the components according to the invention, in particular to explain the action of the armature sleeve 12, FIGS. 3a to 3d show the continuous movement of the first embodiment of the solenoid valve 1 according to the invention in a plurality of illustrations. ing. FIG. 3a shows the de-energized state already described again.

  Subsequently, a current is applied to the magnet assembly 11 to generate a magnetic flux. This magnetic flux also generates a magnetic force for the ferromagnetic element. At this time, when the current or magnetic flux in the magnet assembly 11 increases, the armature sleeve 12 is first pulled toward the pole iron core 2. The movement of the armature sleeve 12 stops only when the armature sleeve 12 is locked by the armature 3. More precisely, it stops when the armature sleeve step 13 is locked to the upper shoulder 14 of the armature 3, as shown in FIG. 3b. In the illustrated embodiment, the displacement distance of the armature sleeve 12 defined through the displacement gap 16 is approximately half of the air gap.

  If the magnetic flux (ie current) further increases at this point, it consists of the movable part of the solenoid valve 1 (the armature 3, the armature sleeve 12, possibly a separate seal bolt of the armature 3, and possibly the retaining ring 15. ) All begin to move upward in the direction of the polar core 2. When the ferromagnetic armature sleeve 12 contacts the polar core 2 (this is illustrated in FIG. 3c), a portion of the magnetic circuit is shorted. This reduces the magnetic force. In the illustrated embodiment, this is achieved with approximately half the air gap 17, i.e. when the armature 3 has overcome half of the distance between the valve closed and valve open positions. The valve open position is understood to be when the valve is fully open and the armature 3 is aligned with the pole core 2.

  Due to the magnetic short circuit and the reduction of the magnetic force, further acceleration of the moving element (especially the armature 3) is reduced, and the final speed just before the moving element is locked by the polar core 2 is also reduced. As a result, the impact at the time of locking is reduced, thereby reducing the noise emission. Even if the armature 3 further moves upward toward the valve opening position, the magnetic short-circuit continues as it is. In FIG. 3d, the solenoid valve is shown in the open position. When energization is terminated, the component is brought back to the non-energized closed position illustrated in FIG. 3a by magnetic force (and possibly continued force such as flow force and / or gravity).

  FIG. 4 shows the force / distance transition showing the relationship between the magnetic force acting on the armature and the distance between the armature 3 and the polar core 2. In this case, the solid line shows the schematic transition for the configuration of the solenoid valve according to the present invention. When the interval between the armature 3 and the pole core 2 as the constituent elements is large (the right part of the x-axis), it indicates that the magnetic force acting at the beginning is small when energized. When approaching, that is, when the interval becomes shorter, the magnetic force increases. The bent portion in the force / distance transition represents the action generated by the locking of the armature sleeve 12 in the pole iron core 2 and the magnetic short circuit resulting therefrom. This reduces the acting force. If the magnetic short circuit is maintained until the armature 3 is locked by the pole core 2, the acting force continues to decrease. This, and thereby the low speed of the armature when locked, reduces the noise emission, thereby improving the noise characteristics. The broken line is shown by extending the force / distance transition in the conventional valve.

DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Pole iron core 3 Armature 4 Spring 5, 6 Valve sleeve 9 Closing element 10 Valve seat 11 Magnet assembly 12 Armature sleeve 13 Step part 14 Upper shoulder part 15 Holding ring 16 Displacement gap 18 Fluid compensation groove 19 Valve chamber

Claims (13)

An electromagnetic valve (1) having a valve sleeve (5, 6) in which a pole iron core (2) is fixedly arranged and an armature (3) is arranged so as to be displaceable in an axial direction, the electromagnetic valve (1) To open and / or close the armature (3) toward the pole core (2) against the force of the spring (4) by the magnetic force induced by the magnet assembly (11) In the solenoid valve,
An armature sleeve (12) is provided that at least partially surrounds the armature (3), the armature sleeve (12) being axially displaced relative to the armature (3) and relative to the valve sleeve (5). A solenoid valve (1) characterized in that it is implemented.   The solenoid valve (1) according to claim 1, characterized in that the armature sleeve (12) is displaceable by the magnetic force.   A contact can be formed between the pole core (2) and the armature sleeve (12), and the magnetic force is reduced by a magnetic short circuit generated in this way. The solenoid valve (1) according to any one of the above.   When the armature (3) approaches the polar iron core (2), the armature sleeve (12) and the polar iron core (2) before the armature (3) is locked by the polar iron core (2) The electromagnetic valve (3) according to claim 3, wherein the magnetic short-circuit is formed by contact with the electromagnetic valve.   The magnetic short circuit is formed by contact between the armature sleeve (12) and the pole iron core (2) at a predetermined interval between the armature (3) and the pole iron core (2). The solenoid valve (1) according to any one of 3 to 4. A magnetic short circuit cannot be formed at the first position of the solenoid valve (1) in which the closing element (9) of the armature (3) closes the valve seat (10);
A magnetic short can be formed at a second position of the solenoid valve (1) where the valve seat (10) is fully open and the armature (3) is in contact with the pole iron core (2);
A magnetic short circuit can be formed at an intermediate position of the solenoid valve (1) where the valve seat (10) is at least partially open and the armature (3) is not in contact with the pole core (2).
A solenoid valve (1) according to any one of claims 3 to 5, characterized in that.   Electromagnetic according to any one of the preceding claims, characterized in that the armature sleeve (12) is positioned between the armature (3) and the valve sleeve (5, 6). Valve (1).   The armature (3) has an upper shoulder (14), and the armature sleeve (12) has a step (13) to allow locking on the upper shoulder (14). 8. Solenoid valve (1) according to any one of the preceding claims, characterized in that:   The distance between the upper shoulder (14) of the armature (3) and the step (13) of the armature sleeve (12) in a non-energized stationary state determines the displacement gap (16), The armature sleeve (12) first displaces the displacement gap (16) until the step (13) of the armature sleeve (12) contacts the upper shoulder (14) of the armature (3). The electromagnetic valve (1) according to any one of claims 1 to 8, characterized in that the electromagnetic valve (1) is used.   A retaining ring (15) is provided between the armature (3) and the valve sleeve (5, 6), and the retaining ring prevents the armature sleeve (12) from passing into the valve chamber (19). The electromagnetic valve (1) according to any one of claims 1 to 9, characterized in that it is configured to do so.   11. Solenoid valve according to any one of the preceding claims, characterized in that the armature sleeve (12) is indirectly coupled to the spring (4) via the armature (3). (1).   12. Solenoid valve (1) according to any one of the preceding claims, characterized in that a fluid compensation groove (18) is provided between the armature sleeve (12) and the armature (3). 1). The components (12, 3, 15) are configured as follows and are aligned with each other:
At position A of the solenoid valve (1), the closing element (9) of the armature (3) closes the valve seat (10) and the armature sleeve (12) rests on the retaining ring (15). So that there is no contact between the upper shoulder (14) of the armature (3) and the step (13) of the armature sleeve (12) and / or
At position B of the solenoid valve (1), the closing element (9) of the armature (3) closes the valve seat (10), the upper shoulder (14) of the armature (3) and the armature There is an abutment between said step (13) of sleeve (12) and / or
At position C of the solenoid valve (1), the closing element (9) of the armature (3) at least partially releases the valve seat (10), and the armature sleeve (12) is connected to the pole core (2). ) So that the armature (3) does not contact the pole iron core (2) and / or
At position D of the solenoid valve (1), the closing element (9) of the armature (3) completely releases the valve seat (10) and the armature sleeve (12) is in the pole core (2). So that the armature (3) also contacts the pole iron core (2),
13. Solenoid valve (1) according to any one of the preceding claims, characterized in that the components (12, 3, 15) are constructed and aligned with each other.

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